Intermittent Missing Graphs for All Devices (Including Localhost)

Help
1

Hi Team,

I’ve been using LibreNMS for quite a long time, and recently I noticed a strange issue — sometimes, all device graphs (including localhost) go missing for about 30 minutes to 1 hour during the daytime. After that period, the graphs reappear automatically without any manual intervention.

During these missing intervals:

  • SNMP polling appears to continue normally.

  • No errors are shown in ./validate.php (all checks OK).

  • No noticeable load or network issue on the LibreNMS server.

I’m attaching screenshots showing the missing graph gaps and the ./validate.php output for reference.

Could anyone suggest what might be causing this?
And are there specific logs or configurations I should check to find the root cause?

Thanks in advance for your help.

Additional Info: